US10190951B2 - Assembly for picking and transporting nanoobjects contained in aerosols, with a cassette the opening of which is secured during the picking - Google Patents
Assembly for picking and transporting nanoobjects contained in aerosols, with a cassette the opening of which is secured during the picking Download PDFInfo
- Publication number
- US10190951B2 US10190951B2 US15/315,853 US201515315853A US10190951B2 US 10190951 B2 US10190951 B2 US 10190951B2 US 201515315853 A US201515315853 A US 201515315853A US 10190951 B2 US10190951 B2 US 10190951B2
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- assembly
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Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2205—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with filters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N2001/222—Other features
- G01N2001/2223—Other features aerosol sampling devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2273—Atmospheric sampling
- G01N2001/2276—Personal monitors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N2001/2285—Details of probe structures
- G01N2001/2288—Filter arrangements
Definitions
- the present invention concerns the field of collection and analysis of nanoparticles susceptible of being present in suspension in the air.
- the present invention proposes to improve the securing of the opening of such a cassette in order to guarantee the integrity of the sampling.
- nanoparticles or particles with nanometer dimensions, have been the subject of intense research and their use has begun to spread into various fields such as health, microelectronics, energy technologies or ordinary consumer products such as paints and cosmetics. It is therefore necessary to create methods for evaluation and monitoring of the exposure of workers, consumers and the environment to nanoparticles.
- sampling devices adapted to be portable and secured as a unit to the work clothes of a worker at a station for the manufacture of nano-objects or the processing of nano-materials might prove to be mandatory.
- the method of choice for sampling consists in aspirating a flow of air liable to be laden with particles through a filter which is then analyzed by various techniques (gravimetry, microscopy, XRF, etc.).
- sampling devices also known as cassette samplers are already known, these being portable and having to sample an aerosol contamination liable to be inhaled through the mouth and the nose of an individual during his respiration.
- a sampler is a device which comprises in particular means of aspiration and on which is secured, generally in removable manner, a sampling cassette holding at least one filter for sampling of contaminants by aspiration.
- the U.S. Pat. No. 4,961,916 concerns a sampling device for gaseous and particulate pollutants comprising a cassette inside which three filters are stacked one on top of the other and comprising two openings on either side of these filters, one of them emerging into the outside environment liable to be polluted and the other one emptying into a pipe connected to a suction pump.
- the first filter enables collecting of only the particulate fraction of the aerosol
- the second filter previously impregnated with a reagent, enables a selective reaction with one or more gaseous compounds
- the third filter only has the function of stiffening the filter assembly.
- the sampling with which this patent is concerned is the collection of gaseous and particulate isocyanates which are present in polluted air.
- the U.S. Pat. No. 5,205,155 for its part discloses a sampling device for asbestos fibers liable to be in suspension in the air and its concern is the nonuniform deposition on the filter housed in the sampling cassette.
- the patent proposes designing the inlet of the cassette, that is, the one near the aspiration orifice of the particular environment, in a flared shape and making it smooth so as to promote a homogeneous deposition of particles on the filter.
- Patent application US 2008/0196514A1 concerns an individual sampling device for dust, used to collect the inhalable fraction of airborne particles.
- This patent describes various shape ratios of the cassette (ratios between length L and inlet diameter D of the opening) which, according to it, allow an improvement in the sampling by aspiration. What is more, this patent mentions that, for the most representative nature of the inhalation through the nose, it is advantageous to provide a vertical orientation of the air flow aspirated from bottom to top.
- Patent application US 2009/0272202A1 concerns an individual sampling device for nanoparticles comprising a cassette with different stages of selection of particles depending on their size.
- the disclosed device comprises an assembly bringing together the different stages with assembly plates held together by springs and guide rods used for guidance during the assembly process.
- the general purpose of the invention is thus to mitigate some or all of the drawbacks of the prior art and especially to improve the cassette according to patent application FR2981154, and thus to propose a solution which guarantees the integrity of the sampling accomplished by a device for sampling and transporting of nano-objects liable to be present in an aerosol and to make sure of the traceability of the sampling up to the point of the elemental analysis proper, even in a situation where an unauthorized person might have adequate means for the opening of the cassette of the device in the assembled configuration.
- elemental analysis is an analysis able to determine which atomic elements (titanium, carbon, nickel, etc.) are present, as well as their atomic percentage in the sample.
- an elemental analysis is not able to determine the structure or how these elements are assembled with one another.
- One particular purpose of the invention is to propose a device of this kind which is simple to produce and low in cost.
- the invention first of all involves an assembly for sampling and transporting nano-objects liable to be present in an aerosol for the purposes of their analysis, comprising:
- the arrangement of the edges of the seat for fixation of the cassette relative to the clipping means is such that they cannot be reached physically, either manually or by a tool, even one adapted to their unclipping, in the assembled configuration of the pieces, when the cassette is in its configuration secured to the apparatus.
- the securing of the opening of the cassette is improved, since when it is secured to the apparatus even a tool adapted to unclipping the means of clipping of the pieces cannot physically reach these means.
- the securing of the opening of the cassette according to the invention makes it possible to limit the risks of contamination of the filter.
- the sources of contamination can be classified into three categories, which can be enumerated as follows:
- the invention makes it possible to strengthen this securing of the sampling: once inserted into its fixation seat on the apparatus, the cassette no longer allows the use of the tool to open it.
- the cassette first needs to be extracted from its seat.
- an unauthorized user who is nonetheless tempted to open the cassette would be forced to remove it from the apparatus to which it is secured.
- an appropriate detection system integrated in the apparatus such as a sound and/or visual alarm, then allows a detecting of the unwanted removal of the cassette, and then interrupting of the sampling. Moreover, a registration of this interruption can then be done.
- the solution according to the invention makes it possible to increase the compactness and robustness of the sampling cassette, of the production tooling for the cassette, as well as of the opening tool of the cassette, and allows their cost to be decreased.
- the reduction in size of the cassette is advantageous both from a standpoint of ergonomics and from one of handling or storage.
- the gain in terms of material cost is linked to the fact that a cassette according to the invention is more compact than a cassette according to patent application FR 2981154. This compactness implies a cost for the tooling to manufacture the cassette (injection molds) that is also lower than that of a cassette according to patent application FR 2981154.
- the invention likewise deals with a sampling device for the assembly described above, wherein the means of holding the filter comprise two shoulders, one produced on an internal periphery of the first piece and the other on an internal periphery of the second piece, the device comprising a filter holder held by squeezing between the two shoulders.
- At least one of the pieces comprises a notch running straight through the annular rim
- the filter holder comprises a tongue that is complementary to the notch (or notches) and to which an identification element of the filter is secured, such that in the assembled configuration of the pieces and in the configuration of the cassette secured to the apparatus the identification element is in contact with the outer environment.
- the identification element is preferably an electronic chip or a radiofrequency ID tag (RFID) or a two-dimensional barcode, of the Datamatrix® type. It may be secured by a gluing technique, by engraving, by overmolding or by tampography. The identification element may also be simply numbers and/or letters in order to be visible and read directly by a person.
- RFID radiofrequency ID tag
- the identification element may also be simply numbers and/or letters in order to be visible and read directly by a person.
- RFID tag can be lodged in the lower piece of the cassette.
- This variant has the advantage of preserving identification on the filter itself, and of being able to subject the filter to analyses which might alter the electronic circuit of a RFID tag. Specifically, by lodging a RFID tag in one and/or the other pieces of the cassette, there are no longer any electronics integrated directly in the filter and the filter holder, and thus an analysis undergone by the filter does not disrupt the electronic circuit of the tag. This also has the advantage of allowing the RFID chip to be brought closer to the sampling apparatus and thus of the transmission power of its antenna being reduced.
- the filter holder is deformable by compression in order to be flattened by the first and second pieces in the assembled configuration and thus form a single gasket.
- the filter can be made of membranes made of alumina; silica, quartz or borosilicate fibers; cellulose or its derivatives such as methylcellulose (MCE); polyvinylidene fluoride (PVDF); polyestersulfone (PES); polystyrene (PS); polytetrafluoroethylene (PTFE); polycarbonate (PC).
- MCE methylcellulose
- PVDF polyvinylidene fluoride
- PS polyestersulfone
- PS polystyrene
- PTFE polytetrafluoroethylene
- PC polycarbonate
- it is several micrometers to several tens of micrometers thick, for example, 10 to 200 micrometers.
- the filters have a thickness between 5 and 30 ⁇ m.
- the first and second pieces and the filter holder are based on thermoplastic material, preferably polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polymethyl methacrylate (PMMA), polyamide 6 (PA6), polyamide 66 (PA66), polycarbonate (PC), polypropylene (PP) or polyoxymethylene copolymer (POM-C).
- thermoplastic material preferably polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polymethyl methacrylate (PMMA), polyamide 6 (PA6), polyamide 66 (PA66), polycarbonate (PC), polypropylene (PP) or polyoxymethylene copolymer (POM-C).
- the first clipping means are formed by a number equal to n of elastically deformable feet whose end comprises an opening and which are arranged on the first piece, being spaced apart by an angular position equal to it 2 ⁇ /n, and in that the second clipping means are formed by a same number n of protrusions of complementary shape to the openings and arranged on the second piece, being spaced apart by the same angular position equal to it 2 ⁇ /n as the feet.
- the invention further deals with a tool designed to perform the unclipping of the two pieces of the cassette, comprising pins which are spaced apart from each other by the same position as the protrusions and able to exert a thrusting on the latter, laterally to the longitudinal axis of the cassette.
- the tool can further comprise means of mechanical guiding able to guide the tool underneath the piece provided with protrusions in order to facilitate the simultaneous lateral thrusting of the pins against the protrusions.
- the invention deals with the use of an assembly as described above as an assembly for monitoring the exposure of workers at a manufacturing station for nano-objects, processing of nano-materials, or use of products containing them.
- FIG. 1 is a profile view of the sampling cassette of a sampling device according to the invention, the cassette being in the assembled configuration,
- FIG. 1A is a bottom view of the cassette of FIG. 1 ;
- FIG. 2 is an exploded perspective view of the cassette of FIGS. 1 and 1A showing the two pieces of the cassette in non-assembled configuration;
- FIG. 3 is a sectional view of the cassette of FIGS. 1 to 2 , further showing a tool according to the invention for the secured opening of the cassette;
- FIG. 4 is a perspective view showing a sampling assembly according to the invention with an apparatus integrating an aspiration pump and a cassette according to FIGS. 1 to 2 in a configuration secured to the apparatus;
- FIG. 4A is a detail sectional view of FIG. 4 ;
- FIG. 5 is a bottom view of the cassette of FIG. 1 showing one variant for the integration of a RFID identification tag
- FIGS. 6 and 7 are respectively perspective and top views of the cassette according to FIGS. 1 to 2 mounted in its opening tool of its pieces;
- FIGS. 8 and 9 are sectional views of FIG. 7 along A-A, respectively before and after opening of the pieces of the cassette.
- the device according to the invention comprises first of all a filter, not shown, which is adapted to trap nano-objects liable to be in suspension in air, which is lodged and held in a cavity formed by a cassette in the closed configuration.
- the sampling method according to the invention consists in orienting the closed cassette so that the air being analyzed is aspirated by a pump, not shown, which is integrated in a sampling apparatus 6 to which the cassette is attached, the air being aspirated from an orifice 20 and emerging from the cassette through an orifice 10 and then going to the pump.
- the aspiration can of course be provided along a reverse path, that is, from the orifice 10 to the orifice 20 .
- the nano-objects or particles of micrometer size so aspirated will be collected on the filter held in the cassette.
- the cassette is oriented so that the sampling is as representative as possible of the respiration by being located less than 30 cm from the respiratory passages.
- the device according to the invention allows collecting of a sample and the transporting of the trapped nano-objects in a secured manner with perfect traceability.
- the assembly for sampling and transporting of nano-objects thus comprises the device with cassette and filter and the sampling apparatus 6 to which the cassette is secured during the sampling and which integrates the aspiration pump.
- the cassette is composed of two pieces 1 , 2 of general cylindrical shape.
- the upper piece 2 is provided with feet 21 which are flexible, in other words elastically deformable, whose end comprises an opening 210 .
- the lower piece 1 is provided with cavities (or “channels”) 11 which are individually complementary to a foot 21 with one end comprising a protrusion individually complementary to an opening 210 .
- cavities or “channels”
- the relative angular arrangement between flexible feet 21 of the upper piece 2 is identical to that of the cavities 11 of the lower piece 1 .
- the feet 21 with their openings 210 fit into and are clipped precisely in the cavities 11 and around the protrusions 110 ( FIGS. 1A and 2 ).
- FIGS. 4 and 4A show the cassette with the pieces 1 , 2 assembled together, such that it is secured to the sampling apparatus 6 integrating the aspiration pump for the contaminants.
- the securing of the sampling is strengthened because the cassette once inserted in its fixation seat 60 on the apparatus does not even allow the use of the unclipping tool for the opening of the latter.
- the cassette first needs to be extracted from its seat.
- an unauthorized user who was nonetheless tempted to open the cassette would need to remove it from the apparatus to which it is secured.
- an appropriate system of detection integrated in the apparatus such as a sound and/or visual alarm, then allows for a detecting of the unwanted removal of the cassette, and an interrupting of the sampling process. Furthermore, a registration of this interruption can then be done.
- the orifice 10 of the lower piece 1 of the cassette is in tight fluidic communication with the aspiration orifice 61 provided in the body of the sampling apparatus 6 .
- the lower piece 1 is provided with holes 13 emerging at the same time on the outside and in the zone where the protrusions 110 are arranged, that is, in the area of the zone where protrusions 110 cooperate by clipping with the feet 21 with their corresponding openings 210 . There are therefore as many holes 13 as there are complementary clipping means.
- the upper piece 2 has three flexible feet 21 , positioned at 120° relative to each other, which fit precisely into the cavities 11 of the lower piece 1 .
- the pump of the apparatus is halted and then the cassette is removed from its fixation seat 60 of the apparatus and then the sampling cassette is opened, that is, the unclipping of the two pieces 1 , 2 is done.
- the lower piece 1 of the cassette is placed on top of the tool 5 facing the pins 50 .
- all the pins 50 are secured to a tool 5 as shown in FIGS. 6 to 9 , which likewise comprises rigid feet 51 spaced apart from each other to allow a seating of the cylindrical body of the lower piece 1 .
- these rigid feet 51 serve as a guide to facilitate the simultaneous thrusting of the pins 50 against the feet 21 .
- the feet can be situated on the lower piece and the holes on the upper piece, without leaving the scope of the invention.
- the filter As for the filter, this is supported by a filter holder.
- the filter holder 3 In the assembled configuration of the two pieces 1 , 2 , the filter holder 3 is held squeezed between the two shoulders 14 , 24 each produced on an internal periphery of one of the two pieces 1 , 2 .
- the filter holder 3 is chosen from an elastically deformable material and it then plays a supplemental role of a gasket between the lower 1 and upper 2 pieces of the cassette.
- a filter holder 3 with a lesser hardness than the materials of pieces 1 and 2 of the cassette, so as to be flattened against the opposite shoulders 14 , 24 , by pressure during the clipping process.
- the filter holder 3 has the role of being a mechanical support for the filter, it can have an overall annular conformation or be made from a single massive piece traversed by a plurality of holes emptying via straight channels in the thickness of the piece, this plurality of holes then forming the filter proper.
- the pieces 1 , 2 of the cassette each comprise a notch 12 , 22 running straight through the annular rim.
- the filter holder 3 comprises a tongue 4 that is complementary to the notches 12 , 22 and on which an identification element of the filter can be produced, so that in the assembled configuration of the pieces and in the configuration of the cassette secured to the apparatus the identification element is in contact with the outer environment.
- RFID radiofrequency identification
- the securing of the RFID tag 4 ′ can be done advantageously by clipping in holding feet 16 provided for this purpose in a portion of the lower piece 1 constituting a seat which is physically protected against the outside.
- This variant has the advantage of preserving an identification on the filter itself, and allowing the filter to be subjected to analyses which might alter the electronic circuit of the RFID tag 4 ′.
- an identification element 4 and/or an identification tag 4 ′ can be utilized in cumulative or alternative manner.
- an identification element 4 and/or an identification tag 4 ′ For example, one may use a number and/or letter code 4 visible to the naked eye of a person from the outside and a tag 4 ′ seated in the lower piece 1 .
- annular rim 15 , 25 in order to provide, in addition to the clipping, a mutual abutment surface between the pieces in their assembled position.
- a device to reduce the aspiration noise 7 is secured to the upper piece 2 , as is described and claimed in the patent application filed today by the applicant and entitled “Device for sampling and transporting of nano-objects contained in aerosols, with a cassette with a module suited to reducing the suction noise during the sampling”.
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1455051A FR3022025B1 (fr) | 2014-06-04 | 2014-06-04 | Ensemble de prelevement et de transport de nano-objets contenus dans des aerosols, a cassette a ouverture securisee lors du prelevement. |
FR1455051 | 2014-06-04 | ||
PCT/IB2015/054209 WO2015186081A1 (fr) | 2014-06-04 | 2015-06-03 | Ensemble de prelevement et de transport de nano-objets contenus dans des aerosols, a cassette a ouverture securisee lors du prelevement |
Publications (2)
Publication Number | Publication Date |
---|---|
US20170097287A1 US20170097287A1 (en) | 2017-04-06 |
US10190951B2 true US10190951B2 (en) | 2019-01-29 |
Family
ID=51518964
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/315,853 Active US10190951B2 (en) | 2014-06-04 | 2015-06-03 | Assembly for picking and transporting nanoobjects contained in aerosols, with a cassette the opening of which is secured during the picking |
Country Status (7)
Country | Link |
---|---|
US (1) | US10190951B2 (fr) |
EP (1) | EP3152542B1 (fr) |
JP (1) | JP6731858B2 (fr) |
CN (1) | CN106662508B (fr) |
CA (1) | CA2951192C (fr) |
FR (1) | FR3022025B1 (fr) |
WO (1) | WO2015186081A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11116187B2 (en) * | 2019-02-05 | 2021-09-14 | California Academy of Sciences | Method and apparatus for collecting and decompressing live specimens with a submersible hyperbaric chamber |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3051123B1 (fr) | 2016-05-13 | 2018-05-11 | Nanoinspect | Cassette amovible pour appareil de prelevement de nanoparticules presents dans un aerosol, et ensemble de filtration pour une telle cassette |
WO2019161058A1 (fr) | 2018-02-16 | 2019-08-22 | Zefon International, Inc. | Dispositif amélioré de collecte d'une matière particulaire |
US12196672B2 (en) | 2020-05-07 | 2025-01-14 | Hand Held Products, Inc. | Apparatuses, systems, and methods for sample testing |
US11846574B2 (en) | 2020-10-29 | 2023-12-19 | Hand Held Products, Inc. | Apparatuses, systems, and methods for sample capture and extraction |
EP4019210A1 (fr) * | 2020-12-24 | 2022-06-29 | Aerosol d.o.o. | Pince d'aspiration pour la manipulation automatique de filtres et chambre de filtre à utiliser avec ladite pince |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4961916A (en) | 1988-06-02 | 1990-10-09 | Irsst-Institut De Recherche En Sante Et En Securite Du Travail Du Quebec | Sampling device |
US4965955A (en) * | 1989-07-31 | 1990-10-30 | Campbell Robert M | Capture apparatus for marine animals |
US5205155A (en) | 1991-03-28 | 1993-04-27 | Envirometrics, Inc. | Air monitoring cassette |
EP1327133A2 (fr) | 2000-10-11 | 2003-07-16 | Christiaan Van Netten | Dispositif personnel d'echantillonnage de l'air |
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- 2015-06-03 CA CA2951192A patent/CA2951192C/fr active Active
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- 2015-06-03 EP EP15732051.6A patent/EP3152542B1/fr active Active
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Also Published As
Publication number | Publication date |
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WO2015186081A1 (fr) | 2015-12-10 |
CA2951192A1 (fr) | 2015-12-10 |
CN106662508A (zh) | 2017-05-10 |
CN106662508B (zh) | 2020-11-06 |
JP6731858B2 (ja) | 2020-07-29 |
EP3152542A1 (fr) | 2017-04-12 |
FR3022025A1 (fr) | 2015-12-11 |
US20170097287A1 (en) | 2017-04-06 |
EP3152542B1 (fr) | 2021-07-28 |
JP2017517735A (ja) | 2017-06-29 |
CA2951192C (fr) | 2022-08-02 |
FR3022025B1 (fr) | 2018-03-16 |
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